Convert 3DS to SH3D

Sweet Home 3D users need this conversion when a furniture model from 3ds Max or an older model library must be placed in a floor plan. The result is not a standalone mesh conversion: the model becomes furniture inside a Sweet Home 3D project saved as .sh3d.

What the 3DS format is

.3ds is the legacy Autodesk 3D Studio scene and mesh format. It can contain polygon geometry, object and material data, texture references, cameras, and lights, although its naming, material, and mesh-complexity limits are restrictive. 3ds Max, Blender, and other 3D applications can import or export it, and it remains common in older furniture and architectural model libraries.

3DS has no dependable universal unit convention. A file may therefore import at the wrong size even when its geometry is correct.

What the SH3D format is

.sh3d is Sweet Home 3D's native project format. It stores a floor plan, walls, rooms, furniture items and their positions, camera views, and project-specific model resources. Its advantages are layout editing, measured placement, furniture dimensions, reusable room plans, and combined 2D and 3D views.

SH3D is not a general-purpose 3D exchange format. Sweet Home 3D imports a 3DS file as one furniture item; it does not convert the complete source scene into independently editable SH3D geometry.

How to convert 3DS to SH3D

1. Install the desktop edition of Sweet Home 3D from the official Sweet Home 3D website. No ordinary online converter can create a complete, valid Sweet Home 3D project from a 3DS mesh.
2. Open an existing home or create one with File → New.
3. Choose Furniture → Import furniture, select the .3ds file, and continue through the furniture import wizard.
4. Enter a furniture name and category. Set the physical size from a known source measurement; do not rely on the original 3DS unit interpretation.
5. Use the wizard's orientation controls to set the model's vertical axis and front direction. Create a catalog thumbnail if the wizard offers that option.
6. Finish the import, place the item in the plan, and check its width, depth, height, elevation, and rotation in the furniture properties.
7. Save the home with File → Save as, for example as room-layout.sh3d. The project retains the imported furniture resource for use in that home.

If direct import fails, open the file in Blender or another desktop 3D editor, repair normals and material assignments, remove unnecessary geometry, and export .obj. Import the OBJ through the same Sweet Home 3D furniture workflow. Keep the OBJ, its .mtl file, and texture images together; missing material files or texture paths produce an untextured model.

For a non-confidential model, an online 3D service such as Aspose.3D can be used to convert 3DS to an intermediate format such as OBJ, after which Sweet Home 3D performs the actual furniture import. Online services do not preserve SH3D project structure, and uploading files may expose proprietary geometry; Blender is preferable when repair, scale control, or privacy matters.

Quality and compatibility limits

The import usually presents the result as one furniture item, even when the source contains several 3DS objects. Lights, cameras, animation, modifiers, procedural materials, advanced shaders, and other non-mesh scene features are not retained. Some material groups may remain visible as separate surfaces, but they are not equivalent to independently editable Sweet Home 3D furniture items.

External texture references are the most common cause of missing surfaces. Resolve them before importing and use simple filenames and supported image formats. Very dense meshes can make Sweet Home 3D slow; decimate them and remove hidden geometry in Blender before export. After importing, verify orientation, scale, elevation, and appearance in both the floor plan and the 3D view.